Extraction of glycerin and fatty matters contained in distillery-vinasses.



GA TON PHILIPPE GUIGNARD; or MELUN, Am) HENRI LOUIS ADOLPHE MARIE WATRIGANT, or LILLE', FRANCE.

EXTRACTION or GLYCERIN' AND FATTY MATTERS corrr'amnn m nIsTrLLnnY- i VI'NASSES.

Ere-eater.

No Drawing.

Specification of Letters Patent.

Patented Apr. 7, 119%.

To all whom it may concern Be it known that we, GASTON PHILIPPE GUIGNARD, a citizen of the Republic of France, and a resident of Avenuedes Marronniers, Melun, Seine-et-Marne, France,

and HENRI Lotus ADOLPI-IE MARIE VVATRI- oAnT, a citizen of the Republic of France, and a resident of i8 Facade de lEsplanade, Lille, Nord, France, have invented a new and useful Process for the Extraction of Glycerin and Fatty Matters Contained in Distillery-vinasses, of which the following is a specification.

The invention has for object the simultaneous extraction of the glycerin and the fatty matters and in some cases of the betain contained in distillery vinasses, and consists in submitting them to a total desiccation followed by lye-washin by means of a mixture of anhydrous et yl alcohol with addition of acetone, and carbon tetrachlorid or other solvent of fatty matters soluble'in alcohol.

ethyl alcohol and thereby to avoid solution by the solvent of bodies soluble in aqueous alcohol.

In practice it is advisable first to separate the organic acids (succinic, tartaric,

citric, etc.,) contained in the vinasses by,

precipitating them with a suitable re-agent such as ferric. hydrate, lime, baryta, etc.

These organic acids are separated from one another as hereafter described.

The following description indicates two examples of the application of the invention, one to grain-vinasses and the other to beetvinasses and molasses.

Grain-vinasses are treated as follows: To the vinasses leaving the distilling column there is added zinc oxid, ferric hydrate,

lime or baryta, and if desired a mixture of. these two bases; the excess is saturated with The total desiccation has for object to prevent hydration of the anhydrous -which are separated by filtration.

called dry malt, from which the fats and glycerin are extracted by washing preferably in an extractor, with anhydrous ethyl alcohol and acetone, or anhydrous ethyl alcohol and carbon tetrachlorid, or a mixture of the three solvents. The solvent liquid removes the fats and the glycerin; the insoluble portion consisting of nitrogenous matter, cellulose, etc, may be used for feedin cattle. The solvent is recovered by distillation leaving a syrupy liquid upon which the fats" float: the two parts are separated by decantation yielding fat and glycerin.

The glycerin is purified in either of the following ways: (1) by distillation in 'cacuo at 179-180". (2) by passing this glycerin through the above mentioned drying apparatus heated below 100 and in 'vacuo; the residue leaving the apparatus is finally treated with the mixture of alcohol and carbon tetrachlorid. Pure glycerin is recovered by evaporation.

The process for the treatment of molasses I and beet-vinasses is the same as that for grain-Vin es up to the treatment with the mixture of, said solvent liquids inclusive. The washing of these liquids in the extractor yields: (1) a solution containing glyc erin and betain. (2) an insoluble portion comprising sodium and potassiumcarbonates, etc., and various non-nitrogenous organic substances. The separation of the glycerin and betain is effected by evaporating the solvent; the residue when completely dried is treated again with carbon tetrachlorid alone which dissolves only the betain. The residue is glycerin which is purified as. above described. The part insoluble in the solvent is dissolved in the minimum quantity of water and saturated with carbon dioxid. The sodium and potassium salts yield insoluble bicarbon zitfis e mother liquors of this treatment serve for the solution of the part insoluble in alcohol in the following operation.

Having thus described our invention, what we claim as such d desire to secure by Letters Patent is i Y 1. The simultaneous extraction of glycerin and fatty matters contained in distilmeans of amixture of anhydrous ethyl alcohol and a solvent of the fatty matters soluole in alcohol.

2. A process for the simultaneous extraction of glycerin and fatty matters from vinasses, comprising the separation of organic acids by precipitationwith a suitable.

base, the filtration and evaporation to dryness of the vinasses, the extraction of the dried residue with anhydrous ethyl alcohol mixed with a solvent soluble therein, the removal by distillation of the mixed solvent, 

